Closure-locking means.



G. J. LJUNGGREN. CLOSURE LOOKING MEANS. APPLICATION FILED our. 16, 1909.

Patented May 10, 1910.

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INV'ENTUR.

AT-r DRNEY.

CARL .T. LJ'UNGGREN, OF PROVIDENCE, RHODE I$LAN11 CLOSURE-LOCKING MEANS.

Specification of Letters Patent.

Patented May 10, 1910.

Original application filed September 2, 1908, Serial No. 451,444.Divided and this application filed October To all whom it may concern:

Be it known that I, CARL J. LJUNGGREN, a subject of the King of Sweden,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inClosure-Locking Means, of which the following is a specification.

The present invention relates to closure locking means purposed for usein massive structures such as vault doors, gun breeches, and posts; andis a division of my pending application Ser. No. 451,444 filed Sept. 2,1908.

The objects of my invention include those commonly sought in this classof structures, but more particularly, to afford intrinsic compensationfor the wear of the parts, to prevent longitudinal play of the same, tofacilitate seating, to distribute the strain throughout the entirestructure, to furnish a maximum of resisting surface, to minimize thenumber of parts, and to avoid the use of threads.

Further objects of invention will appear from an examination of thedrawings and the following description.

To the above and other ends invention consists in the features,combinations, and details of construction hereinafter described andclaimed.

In the accompanying drawings which constitute a part of thisspecification, Figures 1 and 2 are rear and side elevations respectivelyof the novel plug or closure member, Fig. 3 a rear end view of thereceiving orifice, Fig. l, a section of the same on line to w of Fig. 3,Fig. 5, a rear elevation of the closure member assembled in lockedposition, and Fig. 6, a partial section on y y of Fig. 5 showing theclosure member in side elevation.

In the drawings similar reference letters indicate similar partsthroughout the views.

The form of my invention herein described consists of a plug, door, orclosure member A adapted to cooperate with a breech or jamb B. Themechanism for supporting, inserting, rotating, and withdrawing themember A forms no part of this invention and is well known in the art;therefore is not herein illustrated. The member A is preferablycylindrical in general outline having a plurality of segments C of equallength interspaced equidistant from Serial No. 522,930.

each other. Each segment comprises a plurality of radially graduatedstepped portions D, E, F, which extend longitudinally of the body nearlyto the ends of the latter. The front faces d, c, f, of the portions D,E, F, are in the same plane and form a shoulder. The stepped portionsare respectively provided with a series of transversely disposed stepsof gradually lessening radii toward the rear end of the member A, andwhose peripheral faces d c f are parallel with the axis of the member A,and whose rear faces (Z e f are in alinement with each other but inpitched relation to the body.

The stationary member is in the present instance a collar B fixed in thewall I in any desired manner, and incloses a substantially cylindricalorifice J having a circumferential series of radially graduatedlongitudinally disposed entrance channels K, L, and M, respectivelycorresponding in relative dimensions with the stepped portions D, E, F.Within'the orifice J the member B is provided with a plurality oflongitudinally disposed graduated channeled portions N, O, P, whoserespective channels a, 0, p, are transversely disposed and slightlypitched, as well as of gradually diminishing radii rearwardly. Thegraduated channels a, 0, p, which are in alinement with each other, formshoulders adapted to form abutments a, 0, p for the rear faces 0Z 6 7,respectively of the portions D, E, F, as will be hereinafter indicated.

Interengagement of the parts A and B is effected as follows. The memberA, disposed as in Fig. 2, is introduced as a sliding fit into the memberB from right to left as shown in Fig. 6, the stepped portions D, E, F,entering the channels K, L, M, respectively. The member A is then turnedin the direction opposite the hands of a clock bringing the portions D,E, F, into the channeled portions N, O, P, respectively, with theperipheral faces d, c, f, of the shoulders registering in the channelsa, 0, p,- and the rear faces d 6 F, of the shoulders in frictionalcontact with the abutments a, 0, 79 respectively. The shoulder formed bythe faces (Z, c, f, abuts against the internal end face Q of the memberB.

It will be noted that multiple graduated step series and channels andabutments afford a maximum area of bearing surface,

and perfectly dissipates or distributes all axial stress; while theinclined or pitched character of the abutting faces of the parts andtheir accurate alinement insure not only a perfect seating of the parts,but compensates for wear. It will be noted that the portions of bothmembers A and 13 having the greater diametrical and peripheralmeasurements are toward the forward end of the structure. Vhen themember A is employed as a safe door it is preferably supported andseated in the jamb from the inside of the safe in any usual convenientmanner.

What I claim is,-

1. In a device of the type set forth, the combination with a stationarymember, of a closure body, and a segment upon the body comprising aplurality of radially graduated portions, each portion being providedwith a series of transversely disposed steps provided with peripheralfaces parallel with the axis of the closure body.

2. In a device of the type set forth, the combination with a stationarymember, of a closure body, and a segment upon the body comprising aplurality of radially graduated portions, each portion being providedwith a series of transverse steps of gradually lessening radiilongitudinally of the body.

3. In a device of the type set forth, the combination with a stationarymember, of a closure body, and a segment upon the body comprising aplurality of radially graduated portions, each portion being providedwith a series of steps of gradually lessening radii longitudinally ofbody and having a pitched relation to. the body.

4. In a device of the type set forth, the combination with a stationarymember, of a closure body, and a segment upon the body comprising aplurality of radially graduated portions, a series of graduated stepsupon each portion provided with peripheral faces parallel with the bodyaxis, and provided with rear pitched faces in alinement with each other.

5. In a device of the type set forth, the combination of a hollowstationary member provided with longitudinally disposed graduatedchanneled portions, each channeled portion being provided withtransversely disposed grac uated channels of diminishing radiilongitudinally, and a closure member within thestationary member, andradially graduated portions upon the closure member provided with aseries of steps adapted to register in the graduated channels.

I11 testimony whereof I have alliXed my signature in presence of twowitnesses.

CARL J. LJUNGGREN. lVitnesses HORATIO E. BELLOWS, GEORGE H. MCLAUGHLIN.

